Roller coaster accident

In this frame grab from video provided by KTLA-TV Channel 5, workers at Six Flags Magic Mountain rescue people trapped on the Ninja roller coaster after it partially derailed this week.

In this frame grab from video provided by KTLA-TV Channel 5, workers at Six Flags Magic Mountain rescue people trapped on the Ninja roller coaster after it partially derailed this week. (KTLA-TV Channel 5)

In this frame grab from video provided by KTLA-TV Channel 5, workers at Six Flags Magic Mountain rescue people trapped on the Ninja roller coaster after it partially derailed this week.KTLA-TV Channel 5